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After winter service on my Honda Magna VF750. Still runs, but gas drip underneath tank. Possible gasket damage? What all needs done? Change oil and filter and what else?

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  • 54 Answers

You may have a loose fuel line after doing your winter service. Check that they are all snug. If the petcock had force applied to it, you may have damaged the petcock and will need a replacement.
Also check the bottom of the tank and the seams, ensure that the tank isn't rusting from the inside out. I had a V65 Sabre do that once - from previous owner improperly storing bike with only a tiny amount of gas in tank.

Posted on Apr 02, 2017

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Posted on Jan 02, 2017

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SOURCE: Unleaded fuel in VF750 1982 Magna

Yes. Be sure to use premium gas. No ehtanol allowed.

Posted on Apr 12, 2009

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SOURCE: i have a honda magna vf750 the no1 carb keeps

there is a liquid you can buy it is called seafoam, I had the same problem I put it in my gas, ran the bike for 5 minutes , everything worked fine

Posted on Apr 16, 2009

  • 3567 Answers

SOURCE: i have a honda magna vf750 the no1 carb keeps

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb.
clean the air filter and install the carb. Let the float bowl fill then start the engine.

Please rate this solution. Thanks!

Posted on Apr 16, 2009

  • 3600 Answers

SOURCE: 1982 Honda Magna VF750 won't start.

Try starting it then pull the plug out right after trying if the plug is wet you have to much fuel and the float is stuck or has a hole in it and it is most likely your problem if you have fire. if it is flooded you can pull out the spark plug and clean it and kick the motor over to get excess gas out of the cylinder try installing it again then start it, does it fire up? if it does it's flooded due to the problem listed above. If it does not start pull plugs out again add a cap of motor oil in the cylinders and if the plugs are dry reinstall plugs and see if it runs, If it does it may have stuck rings the capful of oil will make the rings seat once this happens they rings should loosen up if not and it will not run after you shut it off then you have low compression. This is assuming you know you have a blue spark to the plug and have cleaned and gapped the plug or plugs. If you need more help psot here and reply tothe e-mail you recieved with this. Hope this helps.

Posted on Sep 01, 2009

  • 20 Answers

SOURCE: What is the best engine oil for my 1994 Honda

I would recommend Mobil 1 Sport bike engine oil.

Posted on Apr 09, 2010

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Hi, Bob there are three ways in which gas can get into your oil tank/system:
1. Someone deliberately pours gas into your oil tank.
2. The vacuum petcock control rubber fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end where it gets pumped back into the oil tank.
3. Nonvacuum petcocks that are not turned to the off position will patiently wait until the float needle and seat no longer function properly thus inviting gas to enter the combustion chamber eventually finding it's way to the oil tank.
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Hi, Anonymous and the usual suspects are:
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3. Air fuel mixture adjustment too lean.
4. Pilot/slow fuel jet clogged.
5. Faulty accelerator pump.
6. Float level too low.
7. Float bowl contaminated old fuel, water, dirt, rust, etc.
8. Carburetor bowl vent line clogged/blocked/pinched.
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11. Intake manifold leak.
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14. Needle and seat stuck closed in the float bowl.
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Hi, Anonymous you're getting ready to go riding you pull out the dipstick to check your oil level and are greeted with the unmistakable smell of gasoline. What happens next depends on the following:
1. You have experienced this before and do not start the engine but do change your oil and filter leaving it 1 quart low until the engine reaches operating temperature then top off as necessary.
2. The amount of time your bike has been sitting since the last time the engine was running.
3. The amount of gas and contaminants in the tank.
4. The oil pump location, exterior or interior.
5. The condition of your petcock gasket/seal/diaphragm.
If your gas tank was low and you start the engine probably nothing you would notice but if your gas tank was full and you start your engine the oil/gas mixture can blow into your air filter, come streaming out of your crankcase breather hose, and launch your oil tank cap followed by a blast of oil. The mess can be minor or you need to call a Hazmat team for assistance. This will also happen if you overfill your oil tank.
Next is the how and why gas can get into your oil tank/system:
a. The vacuum petcock rubber/diaphragm fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end.
3. Nonvacuum petcocks that are not turned to the off position will patiently wait until contaminants from the gas tank build up in between the carburetor needle and seat breaking the seal thus inviting gas to enter the combustion chamber eventually finding it's way into the bottom end and the oil tank.
4. Bottom line if you're not going to ride your bike for a while turn off the petcock.
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Hi, Anonymous and the usual suspects are:
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1 Answer

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Unleaded fuel in VF750 1982 Magna


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